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arXiv 0705.1712nucl-ex
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重离子碰撞中重夸克偶素的重性

Heaviness of Heavy Quarkonia in Heavy Ion Collisions

J. L. Nagle

摘要:

相对论重离子对撞机(RHIC)上的高能重离子碰撞产生了一种新的介质,其特征是初始能量密度比预期的相变值高一个数量级,然后演化为几乎无粘性的液体。用自生粒子探测介质是定量测定介质性质的关键方法。重夸克对是一个很好的探测器,因为它们形成各种夸克偶态的空间分离跨越了介质中色屏蔽长度的相关范围。在这篇论文中,我们描述了从PHENIX实验对$J/ψ$生产的结果,并讨论了测量的初始物理意义。

英文摘要:

High energy heavy ion collisions at the Relativistic Heavy Ion Collider (RHIC) produce a novel medium characterized by an initial energy density over an order of magnitude above the expected phase transformation value and that then evolves as a nearly inviscid liquid. Probing the medium with auto-generated particles is a key methodology to quantitatively determine the medium properties. Pairs of heavy quarks are an excellent probe since their spatial separation to form various quarkonia states spans the relevant range of color screening lengths in the medium. In this proceedings, we describe results from the PHENIX experiment on $J/ψ$ production and discuss initial physics implications of the measurements.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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